<template>
    <el-container class="home-container">
      <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/bmw.png" alt="" width="55" height="55">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出登录</el-button>
      </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleColapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409eff" 
          unique-opened 
          :collapse="isCollapse"
          :collapse-transition="false" 
          router 
          :default-active="activePath"
          @select="menuActive">
          <!-- 一级菜单 -->
          <el-submenu :index="item._id" v-for="item in menulist" :key="item._id">
            <template slot="title">
              <i :class="iconsObj[item.permission_url]"></i>
              <span>{{item.permission_name}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="subitem.permission_url" v-for="subitem in item.children" :key="subitem._id">
              <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{subitem.permission_name}}</span>
            </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
        </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    name: 'hone',
    data(){
      return{
        // 是否折叠
        isCollapse: false,
        // 被激活的连接地址
        activePath: '',
        menulist: [],
         iconsObj: {
          '/1': 'el-icon-s-custom',
          '/2': 'el-icon-s-shop',
          '/3': 'el-icon-document-copy',
          '/4': 'el-icon-s-goods',
          '/5': 'el-icon-s-grid',
          '/6':'el-icon-document'
        },
      }
    },
    created(){
      this.getActiveMenu()
      this.getmenuList()
      this.$bus.$on('getmenuList', this.getmenuList)
    },
    methods:{
      // 点击按钮切换菜单的折叠和展开
      toggleColapse(){
        this.isCollapse = !this.isCollapse
      },
      // 菜单激活回调
      menuActive(index){
        window.sessionStorage.setItem('menu', index)
        this.activePath = index
      },
      // 获取当前激活的菜单，防止刷新页面丢失
      getActiveMenu(){
        let menu = window.sessionStorage.getItem('menu') || '/'
        this.activePath = menu
      },
      // 获取每个角色对应的权限列表菜单栏
      async getmenuList(){
        let _id = window.sessionStorage.getItem('userid')
        let {data} = await this.$http.get('/users/menu/'+_id)
        this.menulist = data.data
      },
      logout(){
        window.sessionStorage.removeItem('token')
        window.sessionStorage.removeItem('userid')
        this.$message.info('退出成功!')
        this.$router.push('/login')
      }
    }
}
</script>
<style scoped>
.home-container{
  height: 100%;
}
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
  }
  .el-header > div{
    display: flex;
    align-items: center;
  }
  .el-header > div > span{
    margin-left: 15px;
  }
  .el-aside{
    background-color: #333744;
  }
  .el-main{
    background-color: #eaedf1;
  }
  .el-aside .el-menu{
    border-right: none;
  }
  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 20px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>